Guia A a Z para Thermodinâmicas, Transferência de calor e massa, e Engenharia de Fluidos
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Similarity transformation [equation]

The changing of the quantitive characteristics of a given phenomenon by multiplying them by constant factors which transform these characteristics into the corresponding characteristics of a similar phenomenon.
Comment. The transformation factors are real, finite, positive numbers which are independent of time, direction and coordinates. For similar processes of the same physical nature of transformation factors are dimensionless variables; for similar physical properties of different physical nature they are dimensional variables.

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